监控所有验证事件

It's quite easy https://stackoverflow.com/a/565560/1997232 to check if certain container or its children have validation errors. This can be used to disable Save button.

我可以使用计时器

public SomeUserControl()
{
    InitializeComponent();
    var timer = new DispatcherTimer
    {
        Interval = TimeSpan.FromMilliseconds(100),
        IsEnabled = true
    };
    Loaded += (s, e) => buttonSave.IsEnabled = IsValid(grid);
    Unloaded += (s, e) => timer.Stop();
}

轮询和禁用按钮。

<!-- container with lots of controls, bindings and validations -->
<Grid x:Name="grid">
   ...
</Grid>

<!-- save button -->
<Button x:Name="buttonSave" ... />

有没有更好的办法？理想情况下，我想要一个活动。不幸的是我发现的唯一事件，验证错误 https://learn.microsoft.com/en-us/dotnet/api/system.windows.controls.validation.error事件，只能在具有绑定本身的元素上使用。浏览儿童元素并订阅（更不用说我必须处理添加新儿童的问题）感觉比投票更糟糕。

想法？

我通常处理这个问题的方式如下所示：

https://social.technet.microsoft.com/wiki/contents/articles/28597.aspx https://social.technet.microsoft.com/wiki/contents/articles/28597.aspx

错误事件将冒泡到容器中，您可以处理它，使用行为或命令将其传递到视图模型。

Like:

<ControlTemplate x:Key="AddingTriggers" TargetType="ContentControl">
    <ControlTemplate.Resources>
        <Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource ErrorToolTip}">
            <Setter Property="HorizontalAlignment" Value="Left"/>
        </Style>

    </ControlTemplate.Resources>
    <StackPanel>
        <i:Interaction.Triggers>
            <local:RoutedEventTrigger RoutedEvent="{x:Static Validation.ErrorEvent}">
                <e2c:EventToCommand   Command="{Binding ConversionErrorCommand, Mode=OneWay}"
                                        EventArgsConverter="{StaticResource BindingErrorEventArgsConverter}"
                                        PassEventArgsToCommand="True" />
            </local:RoutedEventTrigger>
        </i:Interaction.Triggers>
        <TextBlock Text="This would be some sort of a common header" Foreground="LightBlue" HorizontalAlignment="Right"/>
        <ContentPresenter/> <!-- This is how you can have variable content "within" the control -->
        <TextBlock Text="This would some sort of a common footer" Foreground="LightBlue"  HorizontalAlignment="Right"/>
    </StackPanel>
</ControlTemplate>

任何绑定都需要 NotifyOnValidationError=True。